Mouse Article (:

          This article was about a man who wanted to take science further than just letting stuff sit over night and grown in a dish, so he decided to go on and experiment with a cartilage and a mouse. And he started with nutrients and waste removals. Since the scaffolding can be molded into any shape or size, they decide to shape it as an ear.

           So after they had shaped it an what not the tissue was then seeded the scaffold with little cartilage cells and then that implanted the mold under the skin. They did this through surgery.The way this worked is the hairless mouse was specially bred to lack in immune system that might reject the human tissue, nourishes the ear as the cartilage cells grow.So as time passed the ear grew successfully on the hairless mouse.So with that said they ear was removed from the mouse and the mouse lived healthier then ever.

http://www.pbs.org/saf/1107/features/body.htm